diff --git a/action.yml b/action.yml
index cd2f75172..43a5b309a 100644
--- a/action.yml
+++ b/action.yml
@@ -35,6 +35,14 @@ inputs:
     description: "Comma-separated list of usernames to allow without write permissions, or '*' to allow all users. Only works when github_token input is provided. WARNING: Use with extreme caution - this bypasses security checks and should only be used for workflows with very limited permissions (e.g., issue labeling)."
     required: false
     default: ""
+  include_comments_by_actor:
+    description: "Comma-separated list of actor usernames to INCLUDE in comments. Supports wildcards: '*[bot]' matches all bots, 'dependabot[bot]' matches specific bot. Empty (default) includes all actors."
+    required: false
+    default: ""
+  exclude_comments_by_actor:
+    description: "Comma-separated list of actor usernames to EXCLUDE from comments. Supports wildcards: '*[bot]' matches all bots, 'renovate[bot]' matches specific bot. Empty (default) excludes none. If actor is in both lists, exclusion takes priority."
+    required: false
+    default: ""
 
   # Claude Code configuration
   prompt:
@@ -186,6 +194,8 @@ runs:
         OVERRIDE_GITHUB_TOKEN: ${{ inputs.github_token }}
         ALLOWED_BOTS: ${{ inputs.allowed_bots }}
         ALLOWED_NON_WRITE_USERS: ${{ inputs.allowed_non_write_users }}
+        INCLUDE_COMMENTS_BY_ACTOR: ${{ inputs.include_comments_by_actor }}
+        EXCLUDE_COMMENTS_BY_ACTOR: ${{ inputs.exclude_comments_by_actor }}
         GITHUB_RUN_ID: ${{ github.run_id }}
         USE_STICKY_COMMENT: ${{ inputs.use_sticky_comment }}
         DEFAULT_WORKFLOW_TOKEN: ${{ github.token }}
diff --git a/src/github/context.ts b/src/github/context.ts
index 811950f62..936e70e91 100644
--- a/src/github/context.ts
+++ b/src/github/context.ts
@@ -98,6 +98,8 @@ type BaseContext = {
     allowedNonWriteUsers: string;
     trackProgress: boolean;
     includeFixLinks: boolean;
+    includeCommentsByActor: string;
+    excludeCommentsByActor: string;
   };
 };
 
@@ -156,6 +158,8 @@ export function parseGitHubContext(): GitHubContext {
       allowedNonWriteUsers: process.env.ALLOWED_NON_WRITE_USERS ?? "",
       trackProgress: process.env.TRACK_PROGRESS === "true",
       includeFixLinks: process.env.INCLUDE_FIX_LINKS === "true",
+      includeCommentsByActor: process.env.INCLUDE_COMMENTS_BY_ACTOR ?? "",
+      excludeCommentsByActor: process.env.EXCLUDE_COMMENTS_BY_ACTOR ?? "",
     },
   };
 
diff --git a/src/github/data/fetcher.ts b/src/github/data/fetcher.ts
index b59964da0..fb344ac3a 100644
--- a/src/github/data/fetcher.ts
+++ b/src/github/data/fetcher.ts
@@ -20,6 +20,10 @@ import type {
 } from "../types";
 import type { CommentWithImages } from "../utils/image-downloader";
 import { downloadCommentImages } from "../utils/image-downloader";
+import {
+  parseActorFilter,
+  shouldIncludeCommentByActor,
+} from "../utils/actor-filter";
 
 /**
  * Extracts the trigger timestamp from the GitHub webhook payload.
@@ -166,6 +170,35 @@ export function isBodySafeToUse(
   return true;
 }
 
+/**
+ * Filters comments by actor username based on include/exclude patterns
+ * @param comments - Array of comments to filter
+ * @param includeActors - Comma-separated actors to include
+ * @param excludeActors - Comma-separated actors to exclude
+ * @returns Filtered array of comments
+ */
+export function filterCommentsByActor<T extends { author: { login: string } }>(
+  comments: T[],
+  includeActors: string = "",
+  excludeActors: string = "",
+): T[] {
+  const includeParsed = parseActorFilter(includeActors);
+  const excludeParsed = parseActorFilter(excludeActors);
+
+  // No filters = return all
+  if (includeParsed.length === 0 && excludeParsed.length === 0) {
+    return comments;
+  }
+
+  return comments.filter((comment) =>
+    shouldIncludeCommentByActor(
+      comment.author.login,
+      includeParsed,
+      excludeParsed,
+    ),
+  );
+}
+
 type FetchDataParams = {
   octokits: Octokits;
   repository: string;
@@ -174,6 +207,8 @@ type FetchDataParams = {
   triggerUsername?: string;
   triggerTime?: string;
   originalTitle?: string;
+  includeCommentsByActor?: string;
+  excludeCommentsByActor?: string;
 };
 
 export type GitHubFileWithSHA = GitHubFile & {
@@ -198,6 +233,8 @@ export async function fetchGitHubData({
   triggerUsername,
   triggerTime,
   originalTitle,
+  includeCommentsByActor,
+  excludeCommentsByActor,
 }: FetchDataParams): Promise<FetchDataResult> {
   const [owner, repo] = repository.split("/");
   if (!owner || !repo) {
@@ -225,9 +262,13 @@ export async function fetchGitHubData({
         const pullRequest = prResult.repository.pullRequest;
         contextData = pullRequest;
         changedFiles = pullRequest.files.nodes || [];
-        comments = filterCommentsToTriggerTime(
-          pullRequest.comments?.nodes || [],
-          triggerTime,
+        comments = filterCommentsByActor(
+          filterCommentsToTriggerTime(
+            pullRequest.comments?.nodes || [],
+            triggerTime,
+          ),
+          includeCommentsByActor,
+          excludeCommentsByActor,
         );
         reviewData = pullRequest.reviews || [];
 
@@ -248,9 +289,13 @@ export async function fetchGitHubData({
 
       if (issueResult.repository.issue) {
         contextData = issueResult.repository.issue;
-        comments = filterCommentsToTriggerTime(
-          contextData?.comments?.nodes || [],
-          triggerTime,
+        comments = filterCommentsByActor(
+          filterCommentsToTriggerTime(
+            contextData?.comments?.nodes || [],
+            triggerTime,
+          ),
+          includeCommentsByActor,
+          excludeCommentsByActor,
         );
 
         console.log(`Successfully fetched issue #${prNumber} data`);
@@ -318,7 +363,27 @@ export async function fetchGitHubData({
     body: r.body,
   }));
 
-  // Filter review comments to trigger time
+  // Filter review comments to trigger time and by actor
+  if (reviewData && reviewData.nodes) {
+    // Filter reviews by actor
+    reviewData.nodes = filterCommentsByActor(
+      reviewData.nodes,
+      includeCommentsByActor,
+      excludeCommentsByActor,
+    );
+
+    // Also filter inline review comments within each review
+    reviewData.nodes.forEach((review) => {
+      if (review.comments?.nodes) {
+        review.comments.nodes = filterCommentsByActor(
+          review.comments.nodes,
+          includeCommentsByActor,
+          excludeCommentsByActor,
+        );
+      }
+    });
+  }
+
   const allReviewComments =
     reviewData?.nodes?.flatMap((r) => r.comments?.nodes ?? []) ?? [];
   const filteredReviewComments = filterCommentsToTriggerTime(
diff --git a/src/github/utils/actor-filter.ts b/src/github/utils/actor-filter.ts
new file mode 100644
index 000000000..2aebae705
--- /dev/null
+++ b/src/github/utils/actor-filter.ts
@@ -0,0 +1,65 @@
+/**
+ * Parses actor filter string into array of patterns
+ * @param filterString - Comma-separated actor names (e.g., "user1,user2,*[bot]")
+ * @returns Array of actor patterns
+ */
+export function parseActorFilter(filterString: string): string[] {
+  if (!filterString.trim()) return [];
+  return filterString
+    .split(",")
+    .map((actor) => actor.trim())
+    .filter((actor) => actor.length > 0);
+}
+
+/**
+ * Checks if an actor matches a pattern
+ * Supports wildcards: "*[bot]" matches all bots, "dependabot[bot]" matches specific
+ * @param actor - Actor username to check
+ * @param pattern - Pattern to match against
+ * @returns true if actor matches pattern
+ */
+export function actorMatchesPattern(actor: string, pattern: string): boolean {
+  // Exact match
+  if (actor === pattern) return true;
+
+  // Wildcard bot pattern: "*[bot]" matches any username ending with [bot]
+  if (pattern === "*[bot]" && actor.endsWith("[bot]")) return true;
+
+  // No match
+  return false;
+}
+
+/**
+ * Determines if a comment should be included based on actor filters
+ * @param actor - Comment author username
+ * @param includeActors - Array of actors to include (empty = include all)
+ * @param excludeActors - Array of actors to exclude (empty = exclude none)
+ * @returns true if comment should be included
+ */
+export function shouldIncludeCommentByActor(
+  actor: string,
+  includeActors: string[],
+  excludeActors: string[],
+): boolean {
+  // Check exclusion first (exclusion takes priority)
+  if (excludeActors.length > 0) {
+    for (const pattern of excludeActors) {
+      if (actorMatchesPattern(actor, pattern)) {
+        return false; // Excluded
+      }
+    }
+  }
+
+  // Check inclusion
+  if (includeActors.length > 0) {
+    for (const pattern of includeActors) {
+      if (actorMatchesPattern(actor, pattern)) {
+        return true; // Explicitly included
+      }
+    }
+    return false; // Not in include list
+  }
+
+  // No filters or passed all checks
+  return true;
+}
diff --git a/src/modes/tag/index.ts b/src/modes/tag/index.ts
index 488bca362..4e7c2a8f7 100644
--- a/src/modes/tag/index.ts
+++ b/src/modes/tag/index.ts
@@ -89,6 +89,8 @@ export const tagMode: Mode = {
       triggerUsername: context.actor,
       triggerTime,
       originalTitle,
+      includeCommentsByActor: context.inputs.includeCommentsByActor,
+      excludeCommentsByActor: context.inputs.excludeCommentsByActor,
     });
 
     // Setup branch
diff --git a/test/actor-filter.test.ts b/test/actor-filter.test.ts
new file mode 100644
index 000000000..e15cb04c3
--- /dev/null
+++ b/test/actor-filter.test.ts
@@ -0,0 +1,172 @@
+import { describe, expect, test } from "bun:test";
+import {
+  parseActorFilter,
+  actorMatchesPattern,
+  shouldIncludeCommentByActor,
+} from "../src/github/utils/actor-filter";
+
+describe("parseActorFilter", () => {
+  test("parses comma-separated actors", () => {
+    expect(parseActorFilter("user1,user2,bot[bot]")).toEqual([
+      "user1",
+      "user2",
+      "bot[bot]",
+    ]);
+  });
+
+  test("handles empty string", () => {
+    expect(parseActorFilter("")).toEqual([]);
+  });
+
+  test("handles whitespace-only string", () => {
+    expect(parseActorFilter("   ")).toEqual([]);
+  });
+
+  test("trims whitespace", () => {
+    expect(parseActorFilter(" user1 , user2 ")).toEqual(["user1", "user2"]);
+  });
+
+  test("filters out empty entries", () => {
+    expect(parseActorFilter("user1,,user2")).toEqual(["user1", "user2"]);
+  });
+
+  test("handles single actor", () => {
+    expect(parseActorFilter("user1")).toEqual(["user1"]);
+  });
+
+  test("handles wildcard bot pattern", () => {
+    expect(parseActorFilter("*[bot]")).toEqual(["*[bot]"]);
+  });
+});
+
+describe("actorMatchesPattern", () => {
+  test("matches exact username", () => {
+    expect(actorMatchesPattern("john-doe", "john-doe")).toBe(true);
+  });
+
+  test("does not match different username", () => {
+    expect(actorMatchesPattern("john-doe", "jane-doe")).toBe(false);
+  });
+
+  test("matches wildcard bot pattern", () => {
+    expect(actorMatchesPattern("dependabot[bot]", "*[bot]")).toBe(true);
+    expect(actorMatchesPattern("renovate[bot]", "*[bot]")).toBe(true);
+    expect(actorMatchesPattern("github-actions[bot]", "*[bot]")).toBe(true);
+  });
+
+  test("does not match non-bot with wildcard", () => {
+    expect(actorMatchesPattern("john-doe", "*[bot]")).toBe(false);
+    expect(actorMatchesPattern("user-bot", "*[bot]")).toBe(false);
+  });
+
+  test("matches specific bot", () => {
+    expect(actorMatchesPattern("dependabot[bot]", "dependabot[bot]")).toBe(
+      true,
+    );
+    expect(actorMatchesPattern("renovate[bot]", "renovate[bot]")).toBe(true);
+  });
+
+  test("does not match different specific bot", () => {
+    expect(actorMatchesPattern("dependabot[bot]", "renovate[bot]")).toBe(false);
+  });
+
+  test("is case sensitive", () => {
+    expect(actorMatchesPattern("User1", "user1")).toBe(false);
+    expect(actorMatchesPattern("user1", "User1")).toBe(false);
+  });
+});
+
+describe("shouldIncludeCommentByActor", () => {
+  test("includes all when no filters", () => {
+    expect(shouldIncludeCommentByActor("user1", [], [])).toBe(true);
+    expect(shouldIncludeCommentByActor("bot[bot]", [], [])).toBe(true);
+  });
+
+  test("excludes when in exclude list", () => {
+    expect(shouldIncludeCommentByActor("bot[bot]", [], ["*[bot]"])).toBe(false);
+    expect(shouldIncludeCommentByActor("user1", [], ["user1"])).toBe(false);
+  });
+
+  test("includes when not in exclude list", () => {
+    expect(shouldIncludeCommentByActor("user1", [], ["user2"])).toBe(true);
+    expect(shouldIncludeCommentByActor("user1", [], ["*[bot]"])).toBe(true);
+  });
+
+  test("includes when in include list", () => {
+    expect(shouldIncludeCommentByActor("user1", ["user1", "user2"], [])).toBe(
+      true,
+    );
+    expect(shouldIncludeCommentByActor("user2", ["user1", "user2"], [])).toBe(
+      true,
+    );
+  });
+
+  test("excludes when not in include list", () => {
+    expect(shouldIncludeCommentByActor("user3", ["user1", "user2"], [])).toBe(
+      false,
+    );
+  });
+
+  test("exclusion takes priority over inclusion", () => {
+    expect(shouldIncludeCommentByActor("user1", ["user1"], ["user1"])).toBe(
+      false,
+    );
+    expect(
+      shouldIncludeCommentByActor("bot[bot]", ["*[bot]"], ["*[bot]"]),
+    ).toBe(false);
+  });
+
+  test("handles wildcard in include list", () => {
+    expect(shouldIncludeCommentByActor("dependabot[bot]", ["*[bot]"], [])).toBe(
+      true,
+    );
+    expect(shouldIncludeCommentByActor("renovate[bot]", ["*[bot]"], [])).toBe(
+      true,
+    );
+    expect(shouldIncludeCommentByActor("user1", ["*[bot]"], [])).toBe(false);
+  });
+
+  test("handles wildcard in exclude list", () => {
+    expect(shouldIncludeCommentByActor("dependabot[bot]", [], ["*[bot]"])).toBe(
+      false,
+    );
+    expect(shouldIncludeCommentByActor("renovate[bot]", [], ["*[bot]"])).toBe(
+      false,
+    );
+    expect(shouldIncludeCommentByActor("user1", [], ["*[bot]"])).toBe(true);
+  });
+
+  test("handles mixed include and exclude lists", () => {
+    // Include user1 and user2, but exclude user2
+    expect(
+      shouldIncludeCommentByActor("user1", ["user1", "user2"], ["user2"]),
+    ).toBe(true);
+    expect(
+      shouldIncludeCommentByActor("user2", ["user1", "user2"], ["user2"]),
+    ).toBe(false);
+    expect(
+      shouldIncludeCommentByActor("user3", ["user1", "user2"], ["user2"]),
+    ).toBe(false);
+  });
+
+  test("handles complex bot filtering", () => {
+    // Include all bots but exclude dependabot
+    expect(
+      shouldIncludeCommentByActor(
+        "renovate[bot]",
+        ["*[bot]"],
+        ["dependabot[bot]"],
+      ),
+    ).toBe(true);
+    expect(
+      shouldIncludeCommentByActor(
+        "dependabot[bot]",
+        ["*[bot]"],
+        ["dependabot[bot]"],
+      ),
+    ).toBe(false);
+    expect(
+      shouldIncludeCommentByActor("user1", ["*[bot]"], ["dependabot[bot]"]),
+    ).toBe(false);
+  });
+});
diff --git a/test/data-fetcher.test.ts b/test/data-fetcher.test.ts
index 13e0fca02..90359628b 100644
--- a/test/data-fetcher.test.ts
+++ b/test/data-fetcher.test.ts
@@ -1,4 +1,4 @@
-import { describe, expect, it, jest } from "bun:test";
+import { describe, expect, it, jest, test } from "bun:test";
 import {
   extractTriggerTimestamp,
   extractOriginalTitle,
@@ -1100,3 +1100,101 @@ describe("fetchGitHubData integration with time filtering", () => {
     );
   });
 });
+
+describe("filterCommentsByActor", () => {
+  test("filters out excluded actors", () => {
+    const comments = [
+      { author: { login: "user1" }, body: "comment1" },
+      { author: { login: "bot[bot]" }, body: "comment2" },
+      { author: { login: "user2" }, body: "comment3" },
+    ];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "", "*[bot]");
+    expect(filtered).toHaveLength(2);
+    expect(filtered.map((c: any) => c.author.login)).toEqual([
+      "user1",
+      "user2",
+    ]);
+  });
+
+  test("includes only specified actors", () => {
+    const comments = [
+      { author: { login: "user1" }, body: "comment1" },
+      { author: { login: "user2" }, body: "comment2" },
+      { author: { login: "user3" }, body: "comment3" },
+    ];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "user1,user2", "");
+    expect(filtered).toHaveLength(2);
+    expect(filtered.map((c: any) => c.author.login)).toEqual([
+      "user1",
+      "user2",
+    ]);
+  });
+
+  test("returns all when no filters", () => {
+    const comments = [
+      { author: { login: "user1" }, body: "comment1" },
+      { author: { login: "user2" }, body: "comment2" },
+    ];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "", "");
+    expect(filtered).toHaveLength(2);
+  });
+
+  test("exclusion takes priority", () => {
+    const comments = [
+      { author: { login: "user1" }, body: "comment1" },
+      { author: { login: "user2" }, body: "comment2" },
+    ];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "user1,user2", "user1");
+    expect(filtered).toHaveLength(1);
+    expect(filtered[0].author.login).toBe("user2");
+  });
+
+  test("filters multiple bot types", () => {
+    const comments = [
+      { author: { login: "user1" }, body: "comment1" },
+      { author: { login: "dependabot[bot]" }, body: "comment2" },
+      { author: { login: "renovate[bot]" }, body: "comment3" },
+      { author: { login: "user2" }, body: "comment4" },
+    ];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "", "*[bot]");
+    expect(filtered).toHaveLength(2);
+    expect(filtered.map((c: any) => c.author.login)).toEqual([
+      "user1",
+      "user2",
+    ]);
+  });
+
+  test("filters specific bot only", () => {
+    const comments = [
+      { author: { login: "dependabot[bot]" }, body: "comment1" },
+      { author: { login: "renovate[bot]" }, body: "comment2" },
+      { author: { login: "user1" }, body: "comment3" },
+    ];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "", "dependabot[bot]");
+    expect(filtered).toHaveLength(2);
+    expect(filtered.map((c: any) => c.author.login)).toEqual([
+      "renovate[bot]",
+      "user1",
+    ]);
+  });
+
+  test("handles empty comment array", () => {
+    const comments: any[] = [];
+
+    const { filterCommentsByActor } = require("../src/github/data/fetcher");
+    const filtered = filterCommentsByActor(comments, "user1", "");
+    expect(filtered).toHaveLength(0);
+  });
+});
diff --git a/test/install-mcp-server.test.ts b/test/install-mcp-server.test.ts
index a50d46f71..8de7b5ce1 100644
--- a/test/install-mcp-server.test.ts
+++ b/test/install-mcp-server.test.ts
@@ -39,6 +39,8 @@ describe("prepareMcpConfig", () => {
       allowedNonWriteUsers: "",
       trackProgress: false,
       includeFixLinks: true,
+      includeCommentsByActor: "",
+      excludeCommentsByActor: "",
     },
   };
 
diff --git a/test/mockContext.ts b/test/mockContext.ts
index 1a4983b40..19ab04473 100644
--- a/test/mockContext.ts
+++ b/test/mockContext.ts
@@ -27,6 +27,8 @@ const defaultInputs = {
   allowedNonWriteUsers: "",
   trackProgress: false,
   includeFixLinks: true,
+  includeCommentsByActor: "",
+  excludeCommentsByActor: "",
 };
 
 const defaultRepository = {
@@ -55,7 +57,12 @@ export const createMockContext = (
   };
 
   const mergedInputs = overrides.inputs
-    ? { ...defaultInputs, ...overrides.inputs }
+    ? {
+        ...defaultInputs,
+        ...overrides.inputs,
+        includeCommentsByActor: overrides.inputs.includeCommentsByActor ?? "",
+        excludeCommentsByActor: overrides.inputs.excludeCommentsByActor ?? "",
+      }
     : defaultInputs;
 
   return { ...baseContext, ...overrides, inputs: mergedInputs };
@@ -79,7 +86,12 @@ export const createMockAutomationContext = (
   };
 
   const mergedInputs = overrides.inputs
-    ? { ...defaultInputs, ...overrides.inputs }
+    ? {
+        ...defaultInputs,
+        ...overrides.inputs,
+        includeCommentsByActor: overrides.inputs.includeCommentsByActor ?? "",
+        excludeCommentsByActor: overrides.inputs.excludeCommentsByActor ?? "",
+      }
     : { ...defaultInputs };
 
   return { ...baseContext, ...overrides, inputs: mergedInputs };
diff --git a/test/modes/detector.test.ts b/test/modes/detector.test.ts
index c539b8038..c8a6c75ff 100644
--- a/test/modes/detector.test.ts
+++ b/test/modes/detector.test.ts
@@ -27,6 +27,8 @@ describe("detectMode with enhanced routing", () => {
       allowedNonWriteUsers: "",
       trackProgress: false,
       includeFixLinks: true,
+      includeCommentsByActor: "",
+      excludeCommentsByActor: "",
     },
   };
 
diff --git a/test/permissions.test.ts b/test/permissions.test.ts
index 557f7caf1..cf2efdb0e 100644
--- a/test/permissions.test.ts
+++ b/test/permissions.test.ts
@@ -75,6 +75,8 @@ describe("checkWritePermissions", () => {
       allowedNonWriteUsers: "",
       trackProgress: false,
       includeFixLinks: true,
+      includeCommentsByActor: "",
+      excludeCommentsByActor: "",
     },
   });